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https://github.com/SagerNet/sing-box.git
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refactor: Modular inbounds/outbounds
This commit is contained in:
世界
parent
9f7683818f
commit
e233fd4fe5
152 changed files with 3116 additions and 2926 deletions
197
adapter/outbound/default.go
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197
adapter/outbound/default.go
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@ -0,0 +1,197 @@
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package outbound
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import (
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"context"
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"net"
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"net/netip"
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"os"
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"time"
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"github.com/sagernet/sing-box/adapter"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-dns"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/buf"
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"github.com/sagernet/sing/common/bufio"
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"github.com/sagernet/sing/common/canceler"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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)
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func NewConnection(ctx context.Context, this N.Dialer, conn net.Conn, metadata adapter.InboundContext) error {
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ctx = adapter.WithContext(ctx, &metadata)
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var outConn net.Conn
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var err error
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if len(metadata.DestinationAddresses) > 0 {
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outConn, err = N.DialSerial(ctx, this, N.NetworkTCP, metadata.Destination, metadata.DestinationAddresses)
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} else {
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outConn, err = this.DialContext(ctx, N.NetworkTCP, metadata.Destination)
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}
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if err != nil {
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return N.ReportHandshakeFailure(conn, err)
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}
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err = N.ReportConnHandshakeSuccess(conn, outConn)
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if err != nil {
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outConn.Close()
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return err
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}
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return CopyEarlyConn(ctx, conn, outConn)
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}
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func NewDirectConnection(ctx context.Context, router adapter.Router, this N.Dialer, conn net.Conn, metadata adapter.InboundContext, domainStrategy dns.DomainStrategy) error {
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ctx = adapter.WithContext(ctx, &metadata)
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var outConn net.Conn
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var err error
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if len(metadata.DestinationAddresses) > 0 {
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outConn, err = N.DialSerial(ctx, this, N.NetworkTCP, metadata.Destination, metadata.DestinationAddresses)
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} else if metadata.Destination.IsFqdn() {
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var destinationAddresses []netip.Addr
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destinationAddresses, err = router.Lookup(ctx, metadata.Destination.Fqdn, domainStrategy)
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if err != nil {
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return N.ReportHandshakeFailure(conn, err)
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}
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outConn, err = N.DialSerial(ctx, this, N.NetworkTCP, metadata.Destination, destinationAddresses)
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} else {
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outConn, err = this.DialContext(ctx, N.NetworkTCP, metadata.Destination)
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}
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if err != nil {
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return N.ReportHandshakeFailure(conn, err)
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}
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err = N.ReportConnHandshakeSuccess(conn, outConn)
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if err != nil {
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outConn.Close()
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return err
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}
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return CopyEarlyConn(ctx, conn, outConn)
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}
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func NewPacketConnection(ctx context.Context, this N.Dialer, conn N.PacketConn, metadata adapter.InboundContext) error {
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ctx = adapter.WithContext(ctx, &metadata)
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var outConn net.PacketConn
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var destinationAddress netip.Addr
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var err error
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if len(metadata.DestinationAddresses) > 0 {
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outConn, destinationAddress, err = N.ListenSerial(ctx, this, metadata.Destination, metadata.DestinationAddresses)
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} else {
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outConn, err = this.ListenPacket(ctx, metadata.Destination)
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}
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if err != nil {
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return N.ReportHandshakeFailure(conn, err)
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}
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err = N.ReportPacketConnHandshakeSuccess(conn, outConn)
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if err != nil {
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outConn.Close()
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return err
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}
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if destinationAddress.IsValid() {
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if metadata.Destination.IsFqdn() {
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if metadata.UDPDisableDomainUnmapping {
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outConn = bufio.NewUnidirectionalNATPacketConn(bufio.NewPacketConn(outConn), M.SocksaddrFrom(destinationAddress, metadata.Destination.Port), metadata.Destination)
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} else {
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outConn = bufio.NewNATPacketConn(bufio.NewPacketConn(outConn), M.SocksaddrFrom(destinationAddress, metadata.Destination.Port), metadata.Destination)
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}
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}
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if natConn, loaded := common.Cast[bufio.NATPacketConn](conn); loaded {
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natConn.UpdateDestination(destinationAddress)
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}
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}
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switch metadata.Protocol {
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case C.ProtocolSTUN:
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ctx, conn = canceler.NewPacketConn(ctx, conn, C.STUNTimeout)
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case C.ProtocolQUIC:
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ctx, conn = canceler.NewPacketConn(ctx, conn, C.QUICTimeout)
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case C.ProtocolDNS:
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ctx, conn = canceler.NewPacketConn(ctx, conn, C.DNSTimeout)
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}
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return bufio.CopyPacketConn(ctx, conn, bufio.NewPacketConn(outConn))
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}
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func NewDirectPacketConnection(ctx context.Context, router adapter.Router, this N.Dialer, conn N.PacketConn, metadata adapter.InboundContext, domainStrategy dns.DomainStrategy) error {
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ctx = adapter.WithContext(ctx, &metadata)
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var outConn net.PacketConn
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var destinationAddress netip.Addr
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var err error
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if len(metadata.DestinationAddresses) > 0 {
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outConn, destinationAddress, err = N.ListenSerial(ctx, this, metadata.Destination, metadata.DestinationAddresses)
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} else if metadata.Destination.IsFqdn() {
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var destinationAddresses []netip.Addr
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destinationAddresses, err = router.Lookup(ctx, metadata.Destination.Fqdn, domainStrategy)
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if err != nil {
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return N.ReportHandshakeFailure(conn, err)
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}
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outConn, destinationAddress, err = N.ListenSerial(ctx, this, metadata.Destination, destinationAddresses)
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} else {
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outConn, err = this.ListenPacket(ctx, metadata.Destination)
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}
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if err != nil {
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return N.ReportHandshakeFailure(conn, err)
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}
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err = N.ReportPacketConnHandshakeSuccess(conn, outConn)
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if err != nil {
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outConn.Close()
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return err
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}
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if destinationAddress.IsValid() {
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if metadata.Destination.IsFqdn() {
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outConn = bufio.NewNATPacketConn(bufio.NewPacketConn(outConn), M.SocksaddrFrom(destinationAddress, metadata.Destination.Port), metadata.Destination)
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}
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if natConn, loaded := common.Cast[bufio.NATPacketConn](conn); loaded {
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natConn.UpdateDestination(destinationAddress)
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}
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}
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switch metadata.Protocol {
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case C.ProtocolSTUN:
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ctx, conn = canceler.NewPacketConn(ctx, conn, C.STUNTimeout)
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case C.ProtocolQUIC:
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ctx, conn = canceler.NewPacketConn(ctx, conn, C.QUICTimeout)
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case C.ProtocolDNS:
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ctx, conn = canceler.NewPacketConn(ctx, conn, C.DNSTimeout)
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}
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return bufio.CopyPacketConn(ctx, conn, bufio.NewPacketConn(outConn))
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}
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func CopyEarlyConn(ctx context.Context, conn net.Conn, serverConn net.Conn) error {
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if cachedReader, isCached := conn.(N.CachedReader); isCached {
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payload := cachedReader.ReadCached()
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if payload != nil && !payload.IsEmpty() {
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_, err := serverConn.Write(payload.Bytes())
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payload.Release()
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if err != nil {
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serverConn.Close()
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return err
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}
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return bufio.CopyConn(ctx, conn, serverConn)
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}
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}
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if earlyConn, isEarlyConn := common.Cast[N.EarlyConn](serverConn); isEarlyConn && earlyConn.NeedHandshake() {
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payload := buf.NewPacket()
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err := conn.SetReadDeadline(time.Now().Add(C.ReadPayloadTimeout))
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if err != os.ErrInvalid {
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if err != nil {
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payload.Release()
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serverConn.Close()
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return err
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}
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_, err = payload.ReadOnceFrom(conn)
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if err != nil && !E.IsTimeout(err) {
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payload.Release()
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serverConn.Close()
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return E.Cause(err, "read payload")
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}
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err = conn.SetReadDeadline(time.Time{})
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if err != nil {
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payload.Release()
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serverConn.Close()
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return err
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}
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}
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_, err = serverConn.Write(payload.Bytes())
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payload.Release()
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if err != nil {
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serverConn.Close()
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return N.ReportHandshakeFailure(conn, err)
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}
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}
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return bufio.CopyConn(ctx, conn, serverConn)
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}
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